IRWIN Tap Set for Machine Screws, High Carbon Steel, 10-24 NC, 3-Piece (2528)

Had to hand tap a hole in the hardened alloy part and regular tap was just not able to get a bite.This set with taper starter tap did the trick. Started with a taper and slowly in 1/16 revolution increments with lots of downward pressure and plenty of cutting oil was barely able to start it. Took it slow as tap was encountering real resistance from hardened material of the part. Lot's of back turns to clear chips, as i was fearing tap might snap in the hole if i load it too much. Things got a bit tense as it was twisting along the long axis noticeably. On basis of this observation i'm concluding that tap is not high-carbon (HC) steel but rather HSS. I had HC taps snap on me with less twist than this tap was able to handle. Wanted to make this clarification since description does say that it's carbon steel.

No idea how good the taps are as I never got them. I did receive the outer case and it appears to be of high quality, very easy to open. In fact, it was so easy to open it was in the shipping box in a preopened state.Photo is the item as received.Amazon, you're great for most things, but there is no thought for small items that may pop loose in shipping. This isn't the first time that this has happened. Fix it!Edit: So someone at Amazon must keep an eye out, as I received an email requesting what to do to make it right. I just wanted my taps, and they sent out a new package that actually had the taps in them. They were and arrived in fine condition a couple days later. So with these and a set of 10-24 that I bought locally I now have plenty in this size. These particular taps are well made and work fine with a bit of Tap Magic fluid in steel and aluminum. Well worth the price. Now if Amazon could keep small stuff in their boxes....

These are for non-ferrous metals and mild steels. Do not use on tuff stainless steels, high speed steel or case hardened steels. Always use a cutting oil and be patient. 8-32 threads were sharp and of good quality in both brass and bronze. I used the set to place threads in the end of a brass gun barrel cleaning rod. Very nice. Recommended.

Had two (2) "real shallow" holes I was tapping and managed to break the bottom tap (after I ground most of the already short bottom tap partial threads off) So, I would say operator error and not the fault of the tap set. Drilled out the hole diameter slightly and used a 10-32 tap to complete the 2 holes after a local machine shop edm'ed the broken tap piece from the one hole.. That went well I'm happy to say. Did not have to remake the pc., but cost me 3 times material cost to save my work hours.

While obviously the per-piece cost would be less if buying a whole set, I really do not need a whole tap/die set, just a few common sizes is perfect. I would much rather pay a little more per-piece and buy a couple duplicate's of the sizes I use rather than a whole set where I end up using only a few pieces, so I am glad they sell these individually. I would rate the tap as very good quality - I was able to make several repairs and the tap still looks new. If you need a 8 -32 NC (course thread) I would recommend these. I ended up getting a few 8-32 NC and a few 6-32 NC and I use them most often.

While obviously the per-piece cost would be less if buying a whole set, I really do not need a whole tap/die set, just a few common sizes is perfect. I would much rather pay a little more per-piece and buy a couple duplicate's of the sizes I use rather than a whole set where I end up using only a few pieces, so I am glad they sell these individually. I would rate the tap as very good quality - I was able to make several repairs and the tap still looks new. If you need a 6 -32 NC (course thread) this is a good choice - nice tool at a fair price.

I like the fact that I received a tapered starter tap as well as a bottoming tap. Bonus to receive a plug tap. Using them to tap blind holes in 1/2 inch aluminum plate.

Recibí lo que esperaba. Herramienta durable y acero de buena calidad, aunque la uso en aluminio muy ligeramente. 100% recomendable.

Por COVID 19 me era imposible comprar en los negocios locales. Encontré estos en Amazon, de marca prestigiosa. Están muy bien presentados, con estuche duradero y bien identificados. Resolvieron mi problema al llegar un día antes de lo esperado. En fin un producto de mejor calidad del promedio

Por COVID 19 me era imposible comprar en los negocios locales. Encontré estos en Amazon, de marca prestigiosa. Están muy bien presentados, con estuche duradero y bien identificados. Resolvieron mi problema al llegar un día antes de lo esperado. En fin un producto de mejor calidad del promedio

I needed these to cut threads in aluminum in order to mount an handle on an item. I had an older tap, but it simply was not working well. These arrived and the thread cuts were clean and fast. The three tips are great for various jobs, such as "hole thru" or "blind hole". Recommended.

total garbage. worst I have ever bought. snap like crazy on soft aluminum. buy any other brand. I have other stuff from irwin that is just great. just don't buy their small taps.

Just the taps that I needed, repaired my project, saved replacing my saw.Also good quality, easy to use A+